Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Chapter 39, Problem 15TYK
Summary Introduction
Photoperiodism can be defined as the physiological responses of a plant toward day or night length. It is involved in the regulation of various physiological processes such as control of flowering, seed germination, bulb formation, and bud dormancy.
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Pruning plants can promote lateral stems and increased plant biomass by _____________.
Select one:
a.
suppressing cytokinin transport
b.
suppressing auxin transport
c.
promoting cytokinin transport
d.
promoting auxin transport
Root cells exhibit positive gravitropism with the help ofa. auxin in the root cells.b. amyloplasts in root cells.c. exposure to sunlight.d. a nearby substrate.
• On a commercial scale, enhancing the level of _______ (hormone) can help to speed up fruit ripening. • What measure do fruit producers take to slow down fruit ripening that is caused by natural ethylene?• What is a ‘triple response’. Which plant hormone initiates a triple response? • A change in the ratio of ethylene to auxin controls abscission. In the autumn, the amount of __________ decreases, rendering the cells of the abscission layer more sensitive to __________.
Chapter 39 Solutions
Study Guide for Campbell Biology
Ch. 39 - Prob. 1IQCh. 39 - What are the important steps in the transduction...Ch. 39 - What is the plans growth response? What types of...Ch. 39 - Explain how phytochrome can also indicate the...Ch. 39 - What are free-running periods?Ch. 39 - Indicate whether a short-day plant and a long-day...Ch. 39 - Prob. 7IQCh. 39 - Prob. 8IQCh. 39 - Prob. 9IQCh. 39 - Prob. 1SYK
Ch. 39 - Develop a concept map to illustrate your...Ch. 39 - Prob. 3SYKCh. 39 - Prob. 1TYKTCh. 39 - Prob. 2TYKTCh. 39 - Prob. 3TYKTCh. 39 - Prob. 4TYKTCh. 39 - Prob. 5TYKTCh. 39 - Prob. 6TYKTCh. 39 - Prob. 7TYKTCh. 39 - The body form within a species of plant may vary...Ch. 39 - Prob. 2TYKCh. 39 - Small molecules in the cell that amplify signals...Ch. 39 - According to the acid growth hypothesis, a. auxin...Ch. 39 - Which of the following situations would most...Ch. 39 - Prob. 6TYKCh. 39 - Prob. 7TYKCh. 39 - Prob. 8TYKCh. 39 - Prob. 9TYKCh. 39 - Prob. 10TYKCh. 39 - Prob. 11TYKCh. 39 - Prob. 12TYKCh. 39 - Prob. 13TYKCh. 39 - Prob. 14TYKCh. 39 - Prob. 15TYKCh. 39 - Which of the following is not a plant defense...Ch. 39 - Prob. 17TYK
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- Ethylene respond synergistically with another plant hormone ‘X’ for promoting shedding of leaves, flowers and fruits. The hormone ‘X’ can be used in agriculture for a.Inducing fruit ripening b.Increasing internode elongation c.Reducing requirement of irrigation d.Promoting floweringarrow_forwardWhich of the following statements is false?a. Auxin and gibberellin promote stem elongation.b. Cytokinin triggers growth of lateral buds.c. Abscisic acid promotes water loss and dormancy.d. Ethylene promotes fruit ripening and abscissionarrow_forwardPlant cells communicate in a variety of ways to elicit cellular responses. In the figure below the plant is responding the presence of light with the release of auxin. Auxin was first discovered for its ability to promote growth in plants. It is a plant hormone that inhibits the lengthening and stimulate the formation of lateral roots and root hairs. (b) Explain the role that auxin has in eliciting the plant’s response.arrow_forward
- The hormone that helps plants respond to drought is (A) auxin. (B) abscisic acid. (C) cytokinin. (D) ethylene.arrow_forwardWhich combination of hormones is best for promotingthe formation of lateral roots from pericycle?a. A high auxin level and low cytokinin levelb. A low auxin level and high cytokinin levelc. A high level of auxin and cytokininarrow_forwardPhytochrome is a plant pigment protein that: a. mediates plant infection b. promotes plant growth c. mediates morphological changes in response to red and far-red light d. inhibits plant growtharrow_forward
- Which of the following statements is false? a. Auxin and gibberellin promote stem elongation b. Cytokinin promotes cell division in shoot tips c. Abscisic acid promotes water loss and dormancy d. Ethylene promotes fruit ripening and abscission.arrow_forwardMatch the observation with the main hormones.. ___ ethylene a. Your cabbage plants bolt they form elongated flowering stalks. ___ cytokinin b. The potted plant in your room is leaning toward the window ___ auxin c. Lateral buds are sprouting. ___ gibberellin d. The seeds of your roommates marijuana plant do not germinate no matter what he does to them. ___ abscisic acid e. The last of your apples is getting really mushy ___ nitric oxide f. Your lettuce plants develop brown spots on their leaves.arrow_forwardPlant cells communicate in a variety of ways to elicit cellular responses. In the figure below the plant is responding the presence of light with the release of auxin. Auxin was first discovered for its ability to promote growth in plants. It is a plant hormone that inhibits the lengthening and stimulate the formation of lateral roots and root hairs. (c) Explain how the behavioral responses of the plant affect their overall fitness. ( refer to picture )arrow_forward
- What happens when a stem is positively tropic to a certain stimulus? a. Auxins will respond by increasing the growth rate of the side facing that stimulus.b. The stem will respond by growing towards that stimulus.c. The stem will grow and bend away from that stimulus.d. The stem will respond by accumulating auxins in the side facingthat stimulus.arrow_forwardUnder which of the following conditions would pollen from an S2S5 plant successfully pollinate an S1S5 flower? a. Using pollen from a carpelate flower to fertilize a staminate flower would be successful. b. If the plants used gametophytic self-incompatibility, half of the pollen would be successful. c. If the plants used sporophytic self-incompatibility, half of the pollen would be successful. d. Pollen from an S2S5 plant can never pollinate an S1S5 flower.arrow_forwardFar-red light will _________stem elongation and _______seed dormancy. Select one: a. promote, suppress b. suppress, promote c. suppress, suppress d. promote, promotearrow_forward
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